Default blockSize is 4MB.

BroadcastTest2 example added for testing broadcasts.

1 files changed, 59 insertions, 0 deletions

diff --git a/examples/src/main/scala/org/apache/spark/examples/BroadcastTest2.scala b/examples/src/main/scala/org/apache/spark/examples/BroadcastTest2.scala
new file mode 100644
index 0000000000..4b96d0c9dd
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/BroadcastTest2.scala
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples
+
+import org.apache.spark.SparkContext
+
+object BroadcastTest2 {
+  def main(args: Array[String]) {
+    if (args.length == 0) {
+      System.err.println("Usage: BroadcastTest2 <master> [slices] [numElem] [broadcastAlgo] [blockSize]")
+      System.exit(1)
+    }  
+    
+    val bcName = if (args.length > 3) args(3) else "Http"
+    val blockSize = if (args.length > 4) args(4) else "4096"
+
+    System.setProperty("spark.broadcast.factory", "org.apache.spark.broadcast." + bcName + "BroadcastFactory")
+    System.setProperty("spark.broadcast.blockSize", blockSize)
+
+    val sc = new SparkContext(args(0), "Broadcast Test 2",
+      System.getenv("SPARK_HOME"), Seq(System.getenv("SPARK_EXAMPLES_JAR")))
+    
+    val slices = if (args.length > 1) args(1).toInt else 2
+    val num = if (args.length > 2) args(2).toInt else 1000000
+
+    var arr1 = new Array[Int](num)
+    for (i <- 0 until arr1.length) {
+      arr1(i) = i
+    }
+    
+    for (i <- 0 until 3) {
+      println("Iteration " + i)
+      println("===========")
+      val startTime = System.nanoTime
+      val barr1 = sc.broadcast(arr1)
+      sc.parallelize(1 to 10, slices).foreach {
+        i => println(barr1.value.size)
+      }
+      println("Iteration %d took %.0f milliseconds".format(i, (System.nanoTime - startTime) / 1E6))
+    }
+
+    System.exit(0)
+  }
+}